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546476ef7e
libtool junk; copyright messages cleaned up git-svn-id: https://ssl.bulix.org/svn/lcd4linux/trunk@253 3ae390bd-cb1e-0410-b409-cd5a39f66f1f
78 lines
2.0 KiB
C
78 lines
2.0 KiB
C
/* $Id: udelay.h,v 1.5 2003/10/05 17:58:50 reinelt Exp $
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*
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* short delays
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*
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* Copyright 1999, 2000 Michael Reinelt <reinelt@eunet.at>
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*
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* This file is part of LCD4Linux.
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*
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* LCD4Linux is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* LCD4Linux is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*
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* $Log: udelay.h,v $
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* Revision 1.5 2003/10/05 17:58:50 reinelt
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* libtool junk; copyright messages cleaned up
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*
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* Revision 1.4 2002/04/29 11:00:28 reinelt
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*
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* added Toshiba T6963 driver
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* added ndelay() with nanosecond resolution
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*
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* Revision 1.3 2001/03/12 13:44:58 reinelt
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*
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* new udelay() using Time Stamp Counters
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*
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* Revision 1.2 2001/03/12 12:39:36 reinelt
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*
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* reworked autoconf a lot: drivers may be excluded, #define's went to config.h
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*
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* Revision 1.1 2000/04/15 16:56:52 reinelt
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*
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* moved delay loops to udelay.c
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* renamed -d (debugging) switch to -v (verbose)
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* new switch -d to calibrate delay loop
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* 'Delay' entry for HD44780 back again
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* delay loops will not calibrate automatically, because this will fail with high CPU load
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*
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*/
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#ifndef _UDELAY_H_
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#define _UDELAY_H_
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/* stolen from linux/asm-i386/processor.h */
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/* REP NOP (PAUSE) is a good thing to insert into busy-wait loops. */
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static inline void rep_nop(void)
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{
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__asm__ __volatile__("rep;nop");
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}
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#ifdef USE_OLD_UDELAY
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extern unsigned long loops_per_usec;
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void udelay_calibrate (void);
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#else
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void udelay_init (void);
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#endif
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void ndelay (unsigned long nsec);
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#define udelay(usec) ndelay(usec*1000)
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#endif
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